Process Description

A schematic diagram of a DAF process for wastewater treatment is shown in Figure 1. Its essential elements are a flocculation tank, a flotation tank, an air compressor, an air saturator, a recycling pump and a hy-drosweep system. The wastewater is pumped to the flocculation tank after being treated with coagu-lant/flocculent agents such as aluminium sulfate. A portion of the clarified effluent is recycled for pressurization. Compressed air is introduced into the discharge stream of the recycle pump, and the water is saturated with air at high pressure. The pressurized water stream is introduced to the flotation tank through nozzles, where fine bubbles (20-100 |im) in diameter are formed. The bubbles attach themselves to suspended solid particles, causing the agglomerates to float to the surface of the tank. The float can be mechanically skimmed from the surface, and the clarified water is taken from the bottom of the flotation tank.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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